Question

Solve for u in terms of r,s, and t..

r=s+u+t

u= ?

Answer 1

r-s-t = u

Explanation:

r=s+u+t

Subtract s from each side

r-s=s-s+u+t

r-s = u+t

Subtract t from each side

r-s-t = u+t-t

r-s-t = u